Mon Prof Augmenté
Paint Protects Car Metal
Age 11 · Chemistry
Painting car metal puts a coat between the metal and the air. That coat keeps out oxygen and water, so the metal does not rust.
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In the picture
- The painted car panel: a solid coat of paint over the metal.
- The spray nozzle: it sends out a fan of paint mist.
- The bare metal panel: orange-brown spots where rust has started.
Examples
- A painted garden gate stays smooth while an unpainted hinge turns rusty.
- A bicycle frame with scratched paint can rust where bare metal shows.
Key takeaways
- Paint blocks oxygen and water from reaching metal.
- Metal rusts when oxygen and water touch it.
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